And william hanson



(No Model.)

B. 'J. CLAY 8:; W. HANSON.

ESOAPEMENT- FOR TIME PIECES.

No; 356,189. Patented Jan. 18,1887.

UNITED STATES PATENT Orrrcn.

ROBERT J. CLAY, OF JERSEY OlTY, NEW JERSEY, AND \VlLLlAM HANSON, OF BROOKLYN, NE\V YORK, ASSIGNOBS TO THE NEYV YORK STANDARD \VATOH COMPANY, OF NEW YORK, N. Y.

ESOAPEMENT FOR TIM E-PIECES.

SPECIFICATION forming part of Letters Patent No. 356,189, dated January 18, 188'),

Application filed Octr bcr8,1886. Serial No. 215,648.

To aZZ whom it may concern:

Be it known that we, ROBERT J'. CLAY, of Jersey City, in the county of Hudson and State of New Jersey, and \VIL'LIAM Hanson, of the city of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Escapements for W'atches and Clocks, of which the following is a specification.

This invention relates to escap'ements for watches and clocks in which the arbor of the escape-wheel ist'nrnishcd with a worm or endless screw-thread, through which the escapement receives motion from a wheel in the train of the inovcntient, as described in Letters Patent No. 286,685, granted to Robert J. Clay, October 16, 1883. In the escapement described in those Letters Patent the escapewheel was of contrate form, and the escapemeat-lever made with a yoke, through the center of which the escape-wheel arbor passed. The contrate-wheel is expensive to manufacture, and so is the lever with the yoke.

The object of this invention, which is more es- 2 5 pecially designed for very low-priced watches, is to retain all the advantage of an escapement driven through a worm on the escape-whee1 arbor with a simple lever and an escape-wheel of simple (lislelike form, both of which can be easily and cheaply constructed; and to this end our invention consists in the novel combinations, hereinafter described and claimed, of an escapement-lever and an escapewheel the arbor of which is furnished or constructed with a worm or endless screw-thread through which the escapement receives its motion.

Figure 1. is a plan, upon an enlarged scale, of as much of a watch as is necessary to illustrate our invention. Fig. 2 is a side view of 4c the escapement, and Fig. 3 is a face view of the escape-whecl.

Similar letters of reference designate corresponding parts in the several figures.

A A" are the plates of the watch-movement containing the jewels or bearings for the balance-wheel arbor a, the arbor b of the lever L, and the arbor c of the worm-wheel g, which drives the escapement, the said arbors being all three parallel with each other.

(No model.)

(1 is the escape-wheel, which is of simple 5o disk-like forni,with teeth on its periphery, and may therefore be stamped out of sheet metal.

6 is the escape-wheel arbor, having upon it the worm or endless screw j',-which engages with and is driven by the worm-wheel g, which receives continuous motion from the mainspring through apropcr system of wheelwork. This arbor c has its axis radial to the balancewheel arbor a. One end of the arbor c is represented assupportcd by a center screw, h, in a post, t, between the plates A A, and the other end is represented as made with a pivot, which works in a bearing, .90, in an angular cock, j ac, which is secured to the plate A of the movement. 7 d

The lever L is of simple T form, as shown in Fig. 1, the two arms which carry the pallets Z Z forming the head of the T, and the longer arm, which carries the fork m, which engages with the pin a of the balance'wheel, forrning the stem of the T. The axis of the escapewheel arbor e, the axis of the leverarbor b, and that of the balance-wheel arbor a are all arranged in the same plane, although the axis of the escape-wheel arbor is perpendicular to the other two arbors, and the arbor of the lever is directly between the escape wheel arbor and the balance-wheel arbor. By this arrangement of the three arbors, which is shown in Fig. 1, and by placing the bearing a" of the QSGtl} )()-Wl16(3l arbor between the lever-arbor andthe escape-wheel, as shown in Figs. 1 and 2, and so obviating the necessity of extending the escape-wheel arbor beyond the axis of the lever-arbor, we are enabled both to use a disk escape-wheel with the pallet-arms of the lever lying directly across the face of it and to use a plain lever, and hence to very much simplify the movement while retaining the endless screw and worm-wheel for driving the escapewheel arbor.

hat we claim as our invention, and desire to secure by Letters Patent, is

1. The combination, with the balance-wheel arbor and the screw-threaded escape-wheel ar- 95 bor arranged radially to and having the escapewheel at the end nearest to the balance-wheel arbor, of the lever and its arbor arranged dil'ectly between the balance-Wheel arbor and escape-wheel and the pallet-arms of the lever, the said end of the escape-wheel arbor, subsubstantially as herein described.

stantially as and for the purpose herein cle- ROBERT J CLAY. scribed. WM. HANSON.

5 2. The combination of the disk eseapewheel Witnesses to signature of Robert J. Clay:

having a screw-threaded arbor, the lever lying FREDK. HAYNES, directly across the said wheel and having its EMIL HERTER.

axis of oscillation perpendicular to the axis Witnesses to signature of William Hanson: of said arbor, and the bearing for the escape- F. F. MILLS,

10 wheel arbor arranged between the face of the EDWARD S. BERRALL. 

